Carriage position control means for



CARRIAGE POSITION CONTROL MEANS FOR CALCULATING MACHINES H. W. PINCKNEY July 15, 1952 5 Sheets-Sheet 1 Filed Sept.

INVENTOR HAROLD W Pl/VC/(NEY K5444: ATTORNEY July 15, 1952 H. W.-PINCKNEY 2,603,417

CARRIAGE POSITION CONTROL MEANS FOR CALCULATING MACHINES Filed Sept. 14, 1950 5 Sheets-Sheet 2 INVENTOR I I HAROLD W. Pl/VC/(NEY ATTORNEY July 15, 1952 H. w. PINCKNEY 2,603,417

CARRIAGE POSITION CONTROL MEANS FOR CALCULATING MACHINES 5 Sheets-Sheet 5 Filed Sept. 14, 1950 H INVENTOR HAROLD M. P/NCKNEV July 15, 1952 H. w. PINCKNEY 2,603,417

CARRIAGE POSITION CONTROL MEANS FOR CALCULATINGMACHINES Filed Sept. 14, 1950 5 Sheets-Sheet 4 Illll lllllllllli 1 lllll IIIIIIIII IIIIIIIIIIIIIIIII INVENTOR HAROLD W P/NCKNEV ATTO RN E1 y 15, 1952 H. w. PINCKNEY 2,503,417

CARRIAGE POSITION CONTROL MEANS FOR CALCULATING MACHINES Filed Sept. 14, 1950 5 Sheets-Sheet 5 FIG. IO

INVENTOR HA 901.0 144 P/NC/f/VEV AT ORNEY Patented July 15, 1952 CARRIAGE POSITION CONTROL MEANS FOR CALCULATING MACHINES Harold W. Pinckney, Eugene, Oreg., assignor to Monroe Calculating Machine Company, Orange, N. J., a corporation of Delaware Application September 14, 1950, Serial No. 184,744

- 1 The invention relates to carriage position control means for calculating machines and the like and more particularly tothe control of means for tabulating a transversely shiftable carriage to'a selected denominational position. In the performance of many calculations, it is necessary to tabulate the carriage to a selected denominational position to properly relate the factorsof theproblem before the institution of the operation. Furthermore in certain types of calculating-machines it is necessary to shift the carriage to agiven position before a particular operationcanbe instituted; v 'f In the copendin applications of Herman Gang, Serial Nos. 3,544 (nowPatent 2,531,204) and-75,955- (now Patent 2,572,920), issued' on November 21, 1950, and October 20, 1951, respectively; there are shown calculating machines of the type havingdenominationally shiftable carriagesv The machine "disclosed inapplication 8,544 also includes a plurality ofsettableftabulator keysoperable in conjunctin"with right and left carriageshift keys to cause positioning of the carrialge in an intermediate position after initiation of a oarriageshift by operation of a shift key. The machineas disclosed-in application 75,955 includes carriage positioning control means operable to shift the carriage to a given position before aparticular operation can be instituted- In the machines of the-above applications, a multiplier entering operation and institution of a program-of multiplication maybe effectedonly with the carriage-in its left end posion.- -Whi1e thecarriage positioning control means of the machine of application Ser. No. 75,955 may be incorporated-:into'a machine having the tabulating means of application Seri No. 8,544, machines thus constructed havethe disadvantage that the tabulating means may-interfere with the intendedoperation of the carriagepositioning control. means if the tabulating means is not releasedor normalized. That is,- i n the machine of application 'SenNo. 75,955 the-control devices operate to depress the left shift key if the carriage is. out of the left end position. If, however, the operator failstoreleaseany set tabulator keys, the carriagejmay.

not shiftto its leftmost position, necessitating further operation of the machine to accomplish thedesired program.

. The devices of :the present invention avoid the aforeoutlined disadvantageous operational 'fe'atures by. disablement' of the tabulatin'g means upon operation of the control devices of application No. 75,955. Furthermore, a desired tab- 5 Claims. (Cl. 235-63) ular setting may be maintained for subsequent operations.

Other advantages of the invention will be apparent from the following description of a preferred embodiment thereof when read in conjunction with the accompanying drawings wherein reference numerals applied to certain parts designate like parts in applications Nos. 8,544 and 75,955.

In the accompanying drawings,

Fig. 1 is a right side elevation of a calculating machine embodying the invention and showing the parts in normal position.

Fig. 2 is a detailed fragmentary right side elevation of the plus and minus bars related to the right and left carriage shift keys.

Fig. 3 is a fragmentary detailed view showing a portion of the carriage shift initiating means in an operated position.

Fig. 4 is a detailed right side elevation of the devices of the invention shown in Fig. 1 in an operated position.

Fig. 5 is a detailed view of parts shown in Fig. 4 in another operated position.

Fig. 6 is a fragmentary detail of the tabular keys related to devices of the invention as viewed from the rear of the machine.

Fig. 7 is a left side elevation of the machine showing details of the carriage shift control and terminating means.

Fig. 8 is a left side detail of portions of'the carriage shift control means in an operated position.

Fig. 9 is a rear view of the machine showing details of the carriage shift controls and driving means.

Fig. 10 is a fragmentary plan view of parts shown in Fig. 9.

Fig. ll-is a detailed side elevation of the differential clutch mechanism and controls therefor.

Carriage shifting mechanism The registering and carriage shifting mechanisms of the machine embodying the invention are constructed and operate substantially in accordance with the disclosure of Patent No. 2,419,760 of E. F. Britten, Jr., as modified by the disclosure of co-pending application No. 8,548 (how Patent 2,531,207), issued on November 21, 1950, to Herman Gang.

The registering and carriage shifting opera-- tions are performed by power transmitted from a motor I (Fig. 9) through a differential clutch mechanism I04 (Figs. 7 and 11). The registering mechanism is connected to the differential 3 clutch mechanism I35 by normally engaged friction clutch 352 (Fig. 9) and alternatively the carriage shifting mechanism is connected by engagement of a normally disengaged friction clutch 353 which is engaged upon disengagement of the registration clutch.

The differential clutch mechanism is constructed substantially accordance with the disclosure of Patent 1,566,650 of George Chase. Normally, the gearing comprising both working legs of the differential drive rotate idly as described in the aforenoted patent; interruption of the movement of one leg causing the planet gears to move in their orbit in one direction accordingly rotation output gear 438 (Fig. 3) and interruption of the movement of the other leg causing rotation in the reverse direction. The working legs of the differential drive are selectively arrested by means of a clutch lever H I (Figs. 7 and 11) fulcrurned on the machine left side frame and adjustable to neutral, additive and subtractive setting. A click pawl (not shown) holds clutch lever in its adjusted positions. The two active settings provide for additive and subtractive registration or, alternatively, for right and left carriage shift respectively. Clockwise movement of lever III positions it to additive setting whereby a hook arm H of said lever will engage a lug on gear I05 forming one leg of the differential driveto interrupt its movement, thereby causing rotation of output gear 488. Conversely, counterclock- Wise movement positions lever III to subtractive setting whereby a hook arm I I3 thereof will engage a stop I iii of the other leg of the differential to interrupt its movement and cause rotation of output gear 453 in'the reverse direction.

Clutch lever ii! is moved to engage diiferem tial clutch 34 for additive or subtractive registration upon depression of a plus bar 5-23 (Figs. 1 and 2) or a minus bar I2I respectively, Alternatively plus bar {28 and minus bar I2! are depressed upon depression of a right shift key 369 and a left shift key 3'13 respectively; and concurrentlythe depressed shift key causes the disengagement of registration-clutch 352 and the attendant engagement of shift clutch 353 thereby connecting the carriage shifting mechanism to engaged differential clutch I54.

The stems of right and left shift .keys 359, 376, are provided with shoulders which overlie pins in the stems of plus and minus bars/i2 3, IZI respectively. Therefore, depression of a shift key concurrently will depress the related plus or minus bar 525, 25. The plus: bar I25 and minus bar I2I are connected by links 23 (Fig. 2) with an arm 24 which is fixed on a rock shaft J25. Shaft I25 extends across the machine and fixed thereon inwardly of the left side frame is an arm I28 (figs. '7 and 11) having coupling connection i2? with a setting plate I28. Setting plate I23 has-opposed lugs 29 positioned at opposite sides of a tooth I38 vof clutchlever Iii. Upon depression of plus bar I25 or minus bar IEI, shaft 525 and plate 428 will be rocked in one or the reverse direction thereby engaging one or the other of lugs I29 with tooth 35 and rocking clutch lever III' to either its additive or subtractive position. Setting plate I28, when released, is normally spring located in a central position and when in this position, lugs I29 are so spaced from tooth 130 that clutch lever II i may be moved independently of plate I28, and without interference therefrom, to either of 4 its active positions. Coupling 121 permits plate I28 to be uncoupled from shaft I25 so that clutch lever III may be moved to disengage the drive while the plus or minus bar is held depressed. The driving members of registration clutch 352 and shift clutch 353 are connected by a sleeve 354. (Figs. 9 and 10) and are longitudinally movable to compress the friction disks of the normally engaged clutch 352 or alternatively the friction disks (not shown) of the normally disengaged shift clutch 353. Power is transmitted from differential clutch I04 for the registering and carriage shifting operations to the driving members of clutches 352 and 353by a gear 355 fixed on the driving member of clutch 353 and engaged by the output gear 438 of differential clutch I54. The driven element of shift clutch 353 is fast with a gear 356 having intermediate gear connection with a gear 35? fast upon a shaft 319 which carries shift worm 358. A spring urged plunger 359 is mounted on the rear of carriage 2 and engages shift worm 358. Therefore, upon disengagement of registration clutch 352 and the engagement of shift clutch 353, differential clutch I84, upon engagement, will drive worm 358 to shift carriage 2 one denominational order for each revolution of the worm.

Registration clutch 352 is held normally in engagement by a toggle comprising links 362 (Figs. 9 and 10). The right toggle link, as viewed in Figs. 9 and 10, has fixed pivotal mounting at its right end and the left toggle link is pivotally connected at its left end to one end of a lever 36!]. The other end of lever 360 is connected to the machine frame by a link 36I and antifriction rollers mounted intermediate the ends of lever 368 engage a pair of flanges on sleeve 354 which connects the driving members of clutches 352, 353. A spring 364 attached to lever 36I biases sleeve 354 toward the left, thereby holding clutch 352 engaged under spring tension. Upon breaking of toggle 362, a spring 353, attached to lever 360 will shift sleeve 354 toward the right, thereby disengaging clutch 352 and engaging shift clutch 353. Toggle 362 is broken upon depression of a shift key 369 or 316 as follows:

One intermediately pivoted lever 368 (Figs. 1, 4 and 5) is, engaged at its forward end by the-stems of shift keys 369, 310, and at its rear end lever 368 is pivotally connected with the lower end of an arm 361 which is guided at its upper end by slot engagement with a shaft 365. A shoulder 361 of arm 36;! underlies a laterally bent lug of a lever 439 which is fast on shaft 365. A finger 366 (Figs. 9 and l0),also fast on shaft 365 cugages a lug 362 of the right toggle link adjacent its connection with the other link of the toggle 362. Upon depression of one or the other of the shift keys, lever 368 will be rocked, thereby raising arm 36! to the position shown in Figs.- 4 and 5 and causing shoulder 361 to rock lever 439, shaft 365, and finger 366 to break toggle 362. Accordingly, registration clutch 352 (Fig. 9) will be disengaged and shift clutch 353 engaged as differential clutch I04 is selectively engaged to determine the direction of carriage shift.

Certain other controls are necessary in effecting the shifting operation, since the carriage shifting worm 358 must be released from a normal location means when the operation is initiated. Also, at the end of the shifting operation, differential clutch I04 must be disengaged and v toggle 362 must be reset to disengage shift clutch 353 and reengage registration clutch 352.

These operations are effected by a two phase shift control clutch 31i (Figs. '1 .and 8) which is engaged for a partial cycle of operation when toggle 362 is broken and again engaged upon termination of the shift to complete its cycle of operation. The driving element of the clutch has direct gearing connection with the motor I, and a spring biased clutch pawl mounted upon the driven element of the clutch is normally held out of engagement with the driving element against the tension of its spring by a detent 442 engaging the pawl through a cut-away portion of the clutch housing.

When toggle 362 is broken to initiate a shift, a link 316 (Figs. 9 and 10) connected to a crank extension of the right link of toggle 362 will be movedto the right, thereby rocking a pair of bell cranks 440, 44 l (Figs. 7 and 8.) Bell crank 44l engages detent 442 and its rocking movement will move the detent against the tension'of a spring 453 from engagement with the pawl of clutch 31l, thereby permitting the pawl to engage the clutch. The lower active end of an intermediately pivoted detent 313 normally engages the housing of clutch 31l, and-a roller at the upper end of the detent normally engages a notch in a disk 386 as shown in Fig. '1. Disk 386*issplined on worm shaft 319 and the engagement of the roller of detent 313 in the notch of the disk will prevent rotation of shift worm 358 and consequently hold carriage 2 in its shifted position. Upon partial rotation of clutch 31I, detent 313, as shown in Fig. 8, will be urged through the aperture of the clutch housing by a spring 450 attached to a tripping arm 38| which has pin and slot connection with the detent. This movement of detent 313 will engage its lower end with the pawl of clutch 31 I, thereby disengaging the clutch, and will remove the roller at its upper end from the notch of disk '386, thereby freeing worm 358 for the shifting operation.

The carriage will be continuously shifted until the depressed shift key 368 or 31!] (Figs. 1 and 2) is released or until the carriage has been v shifted into one or the other of its end positions.

Upon release of the shift key, spring 452 (Figs. 1', 4, and 5) will restore shaft 365 to provide for reengagement of shift control clutch 31! as followsz Disk 386 as shown in Fig. 9, is connected by a sleeve with a second disk 318 which is normally held toward the left against the bias of a spring 318' by an arm 311 of link 316. Upon breaking oftoggle 362 arm 311 will be moved to the right (Fig. 9) with link 316. However, disk 318,"and with it disk 386, will now be held in' flleftward position by a stop arm 383 (Fig. 8) which is fixed on shaft 365 and is moved into engagement with disk 318 when said shaft is rocked-to breaktoggle 362. When shaft 365 is restoredupon release of the depressed shift key, stop am" 383 will be moved from engagement with disk 318 and spring 318 will then be effective to move disks 318, 386 toward the right. Upon movement of disk 366 to the right, a pin 386'(Figs.-7 and 8) on the disk will be brought into the plane of a cam extension of tripping arm 38f. As'the current shift cycle nears completion, pin-380 will engage the cam extension of the tripping arm 38!, thereby putting detent 313' under tension of a spring 451 which connects the -detent' and the tripping arm. Therefore, as the' parts arrive at full cycle position the roller of detent 313 will be moved into the notch of disk 386 thus locating the carriage in its new position and rocking said detent from engagement with the pawl of clutch 31! thereby permitting reengagement of the clutch.

The final phase of operation of shift control clutch 31l effects the disengagement, of differential clutch I84 and resets toggle 362, thereby re-' engaging registration clutch 352 and disengaging shiftclutch 353. For the purpose of disengaging differential clutch 164, a cam 312 (Figs. 7 and 8) fast with the driven element of clutch 31! engages a roller mounted on a follower 454. Fol- 1ower454 has latch connection 456 with ya lever 455 which engages a shoulder of a link 424. Link 424 is pivotally attached at its forward end to the upper end of. a stop arm 24 (Fig. 7) which is pivotally mounted at its lower end to the machine frame, and at its rear end link 424 is attached to a crank 425 fixed on a rock shaft 426 which extends across the machine. Stop arm 24 is spring biased in normal counter-clockwise position against a fixed stop and in the final operation of clutch 311, stop arm 24 will be rocked in clockwise direction by cam 312 through the connecting linkage and returned to normal by its spring. In the reciprocatory movement of stop arm 24, a cam slot 144a (Fig. 11) at the rear of an extension I44 of the arm will engage a pin I45 of clutch lever ll I thereby moving said lever to neutral position. Furthermore upon reciprocation of arm 24, shaft 426 will be rocked counterclockwise (Fig. 7) and return by link 424. Shaft 426 has link connection 421 (as shown in dotted lines Fig, 1) with an arm 429 which is pivotally mounted on the right side frame. When shaft 426 is rocked, arm 429 will be rocked to effect operations hereinafter described.

Toggle 362 will be reset during the final operation of clutch 31l by means of a cam 39! (Fig. '7) fast on the driven element of the clutch and engaging a roller on bell crank 44!. Thus, bell crank MI and connected bell crank 446 will be restored, thereby moving link 316 to the left (Figs. 9 and 10) and resetting toggle 362 which will reengage registration clutch 352 and disengage shift clutch 353. Also, restored bell crank 44! will release detent 442 which will engage the pawl of clutch 31! and disengage said clutch.

Carriage shift (last place stop and tabulcting keys) Should either shift key be held depressed until the carriage is shifted into an end position, shift initiating shaft 365 (Figs. 1, 4, and 5) will be restored to normal and the drive terminated in substantially the same manner as described when shaft 365 is restored upon release of shift key. For this purpose, two lugs 468 (Fig. 6) are located on the rear of carriage 2 and so spaced that the nose of a plunger 438 (Figs. 1, 4 and 5) mounted on arm 361 is positioned just below one or the other of said lugs when the carriage is in either of its end positions. Should the carriage be in the right end position, for example, and the left shift key 310 depressed, the plunger 438 which is spring urged to a normal extended position will be depressed by contact with the leftmost lug 468 when arm 361 is raised and the shift initiated.

When the carriage is shifted from the right end position, the lug 460 will be removed from contact with plunger 438 and said plunger will be spring urged to normal extended position. As the carriage is shifted into the left end position,

the side of the nose of .plunger'438 will be enaged by the rightmost lug .466, thereby moving the plunger and arm 36'! toward the rear (Fig. of the machine against the tension of a spring 36711. This movement of arm 36?. will remove the shoulder 36'! thereof from restraining engagement with the 111g of lever 439 allowing said lever and shaft 355 to be spring restored to normal and thus terminate the shift. Upon movement of stop arm 24 (Fig. 7) to disengage 'differential clutch I04, a pin E l-a of the stop arm will engage and disconnect coupling I21 so that setting plate E28 may be spring restored to normal and thu permit clutch lever ii! to be moved to neutral position. When the shift key and the related plus or minus bar .is finally released, coupling I21 will be restored .by shaft I to reengage setting plate i255. Also, upon release of the shift key, plunger 338 will drop below lug 468 and arm 36? will be urged forwardly by its spring, thug locating shoulder thereof in normal engagement with lever 133. Termination of a car.- riage shift in the opposite end position is, as will be readily understood, accomplished in the same manner. Should a shift key be depressed while the carriage is in the end position of the indicated shift, engagement of the shifting drive will be effected, but as the plunger .359 is at the end of worm 358 the drive will be. ineffective to move the carriage. However, plunger which i spring urged within the groove of worm 358 will be raised to ride over the outer diameter of the worm by the eccentric conformation ofthe worm at either end.

The tabular keys M2 (Figs. 1 and 6) one for each denominational order intermediate the two end positions of the carriage, are located on the rear ofv the carriage intermediate the lugs 459. The lower end 365 of each key 282 is bent outwardlyfrom the carriage to form a lug at substantially the same angle as the lugs and isprovided with a pair of oppositely inclined edges which are adapted to displace plunger 38 in the same manner as described in connection with the inclined cam edges of the lugs 683. In the unset position of tabularkeys 462, the lugs 46! are raised above and out of the range of plunger 433 when a shift key .is depressed. However, when one of the keys 492 is depressed, its lugfi lfil is brought into the same plane as the lugs 460 and should the carriage be shifted either to the right or left, the arm 36? will be displaced (Fig. 5) pivotally against the tension of its spring by contact of the nose of plunger 43% with one or the other of the cam edges of the lug .46! of the set tabular key to terminate the shift in the same manner as that previously described in connection with lugs 5% of the carriage. It will be noted that upon termination of the carriage shift arm 35? will be held in rearwardlydisplaced position by contact of the .nose of plunger 438 with the lug it! of the set key. However, upon release of the shift key, arm 36.? will be lowered and moved forwardly by its spring, shoulder-351' of saidfarzn will be positioned below the lug of lever 339,-and plunger 433 will be located below the lug 138! of the set key. With plunger 438 being-thus restored to normal lowered position and the carriage being still located in the order indicated by the set tabular key, upon depression of either shift key and the consequent raising of arm 36'', the plunger 43% will be depressed against the tension of its spring by contact with the overlying =lug it! of the set key. Therefore there will be no interference with the raising of arm 36-! in initiating the shift. The carriage (being thusshifted into a new order, .thelug .461 of the set keyxwill no longer overlieplunger .438, which willpbe restored to normal extended position by .itssprin and thus conditioned tocontact. one or the other.

of the end lugs .460 ofthe carriage to terminate the shift in either extreme position thereof. 1

lcm riage positionzcontrol means means of co-pending application 75,955 :heretofore noted. Other control operations efiectedgby the devices of said application have no operating relation ,with the devices of the present invention. and-reference is made :to said application for the details of ioperation not disclosed herein, The carriage position control means comprises a member 762 (fig-s. ;l and 1 which 'is pivotally. supported at the endqcf a forwardly extending arm of abellprank 1-53. Bell crank I53 ispivotally mounted on 'afixed stud 164 on the left side frame and the depending arm thereof is adaptedfor engagement by a pin 3'65 of arm 429. Member 762 overlies a pin 166 in the stern of left shift key 316 and a downwardly extending leg 162a of said member is provided with an open end slot whichengages pin QSSa a-t the end of theforward arm of lever 368. An adjustable slide 76'! has pin and slot mountin 1-68 on member E62 and an upstanding-shoulder iBTa'at itsleft end is engageable by a pin 7-6 9 on the stem of a freely retractable operating member comprising key 526, Slide 1-6! is urged byspring TH] toward the rear of the-machine thereby locating shoulder 167a thereof below. and' into the path-of-movement of pin 7-69 when the carriage is'out o f'its leftmost position. 1 However, adjusting means comprising arm 1'13, lever 568 and carriage log 54'! through finger 7617b operates to move slide 16'! forwardly against the tension of its spring when carriage 2 is shifted to the left end position thereby locating shoulder 'I-G'Ia out of the path of movement of pin 169. Reference is made to application 75,955 for the details of theadjusting means of slide 16?. The control means comprising member 162, bell erank .163, and slide are held in normal raised position (Fig. l) by meansof a'toggle spring HI attached to arm 162i) and to a pin on the machine frame} the upward movement beinglimited by contact of member 162 with the key plate of the machine From the foregoing, it will be seen that if the carriage is in its left end position, depression of key 526 will move pin 169 ineifectively to the rear of. shoulder 161a of slide 161. However, if the carriage isout of the left end position, depression of-key 526 will engage pin [69 (Fig. 4) withshoulder 161a thereby rocking slide 161, member #62 and bell crank 763 counterclockwise as a unit, about pivot 164 thus depressing left shift key- 3l-6.

Upon release of key 526, the parts willbeheld in operated position by toggle spring .71! thus holding left shiftkey 3T0 depressed. Upon movement of the carriage into the left end position, the shifting operation will be-terminated and as an incident thereto arm 429 will be rocked counterclockwise as described. The counterclockwise movementof arm .429 will engage pin Z165 thereon withthe depending arm 163a of bell crank (63 thereby rocking said crank .and the con-:

there will be no interference with the clockwise restoration of the parts upon termination of the shift.

Disablement of the tabulating means A shifting operation instituted upon depression of key 520 (Figs. 1 and 4) is intended to be terminated upon movement of the carriage into the left end position as described. However, a tabular key 402 set in a position intermediate the left end and a rightward position of the carriage, would result in the termination of a leftward carriage shift out of the left end position. Such undesirable and unintended operation is prevented by disablement of the normal shift terminating operation of any set tabular keys 402 by the devices of the invention.

The disabling means comprises a latch lever 800 which is pivotally mounted on the left side frame adjacent lever 439. Latch 800 is spring biased toward counterclockwise effective position but is normally held in clockwise ineffective position (Fig. 1) by pin and slot connection with a link which has pivoted connection at its forward end with the depending arm 163a of bell crank 163. Therefore when bell crank [63 is in normal clockwise position, link 80l will be held toward the front of the machine thereby holding latch 000 in ineffective clockwise position against the tension of its spring.

Upon depression of key 526 and the attendant counterclockwise movement (Fig. 4) of bell crank 163, link 80! will be moved toward the rearthus permitting counterclockwise movement of spring urged latch 800. A pin 439a. on the forward arm of lever 439 will be raised above the active end of latch 800 when said lever and shaft 305 are moved clockwise to initiate the shifting operation. The active end of spring urged latch 800 will therefore be moved beneath pin 439a to prevent the counterclockwise shift terminating movement of lever 439 and shaft 365 should arm 36'! be displaced (Fig. 5) by a lug 46! of a set tabular key 402.

When latch 800 is moved to active position, the free end of an upwardly extending arm 800 thereof will be moved counter-clockwise into engagement (Figs. 4, 5, and 6) with carriage shaft 2a. Shaft 2a moves longitudinally with the carriage in the shifting operation and has suitable bearing in the machine frame thereby supporting the carriage at its rear. A collar 802 (Figs. 1 and 6) is mounted on shaft 2a adjacent its right end (left end Fig. 6). Upon movement of the carriage into its left end position, collar 802 will engage arm 800 and rock latch 800 clockwise from the position shown in Fig. 5 which movement is permitted by the pin and slot connection with link 80 I. Lever 439 and shaft 365 will therefore be released by latch 800 to terminate the shift. The slot and pin connection with latch 800 will permit forward movement of link 80! to normal (Fig. 1) upon clockwise movement of bell crank 163 to normal thus holding latch 800 in normal ineffective position when the carriage is shifted from its left end position and arm 800' is removed from engagement with collar 802.

Although a specific embodiment of the invention has been disclosed, it will be apparent that 10 other applications of the invention may appear to those skilled in the art. It is understood therefore that the invention is to be restricted only as necessitated by the spirit of the appended claims. I

I claim:

1. In a motor driven calculating machine having a denominationally shiftable carriage, mechanism operable to shift said carriage to any one of a plurality of intermediate positions and to an end position including a control member movable to initiate the operation, means operable to terminate operation of said shifting mechanism and a carriage position device operable upon movement of said carriage into said end position to initiate operation of said shift terminating means; the combination of a plurality of depressible tabular keys each including a contact member corresponding to a respective one of said intermediate positions and adjustable from ineffective to effective position upon depression of the related key, means formaintaining any of said keys in depressed position, an element displaceable by the contact member of any depressed key upon movement of said carriage into the intermediate position corresponding thereto, power means including a spring operable upon displacement of said element to initiate operation of said shift terminating means and an operating member for moving said shift control member to shift initiating position; with a normally ineffectively positioned latch adjustable upon movement of said operating member to restrain said power means from operation upon displacement of said element and means operable to adjust said latch to ineffective posi-, tion upon movement of said carriage into said end position. v

2. In a motor driven calculating machine having a denominationally shiftable carriage and mechanism operable to shift said carriage to anyone of a plurality of intermediate positions and to an end position including a control member movable to initiate the operation; the combination of a plurality of depressible tabular keys each including a contact member corresponding to a respective one of said intermediate positions and adjustable from ineffective to effective position upon depression of the related key, a nonadjustable contact member, means for maintaining any of said keys in depressed position, an element displaceable by the contact member of any depressed key upon movement of said carriage into the intermediate position corre-'- sponding thereto or by said non-adjustable contact member upon movement of said carriage into said end position, means operable to terminate operation of said carriage shifting mechanism including spring powered initiating means operable upon displacement of said element and an operating member for moving said shift control member to shift initiating position; with a normally ineifectively positioned latch adjustable upon movement of said operating member to hold the operation of said spring powered means in abeyance upon displacement of said element by the contact member of a depressed key and means operable to adjust said latch to ineffective position upon movement of said carriage into said position.

3. In a motor driven calculating machine having a denominationally shiftable carriage, mechanism operable to shift said carriage to a plurality of intermediate positions and to an end position, a spring retracted member movable to positicnenective toinitiate andto maintain operation of said carriage shifting'mechanism, a shift control train operable to moveand to hold said member iii-effective position including a coupling displaceable to permit independentretraction of said member by its spring, means responsive to the retraction of said member to terminate operation of said carriage shifting mechanism and a contact member for displacing said coupling upon movement of said carriage into said end position; the combination of a plurality of depressible tabular keys each corresponding to a respective one ofsaid intermediate positions, means formaintaining any of said keys in depressed position, a plurality of contact members each related toa respective key and each adjustable upon depression of the related key from ineffective position to a position effective to displace said coupling upon movement of said carriage into the position corresponding to the depressed key and an operating'member for moving said shift control: train, to operated position; With a normally ineifectively positioned latch adjustable upon movement of said operating member to restrain said spring retractable member in. effective position upon displacement of said. coupling and a contact member for adjusting said latch to ineffective position upon movement-of said carriage into said end position. I

4. In a motor driven calculating machine having a fixed frame, a carriage transversely shiftable on said frame to a plurality of denominational intermediate positions and to an end position and mechanism for shifting said carriage to any of said positions including a shift control member movable toinitiate the operation; the combination of a plurality of depressible tabular keys each including a contact member corresponding to a respective one of said intermediate positions mounted on said carriage and adjustable from ineffective to effective position upon depression of the related key, a fixed contact member mounted on said carriage, means for maintaining any of said keys in depressed position, an element mounted on said frame and displaceable by the contact member of any depressed key upon movement of said carriage into the intermediate position corresponding thereto or by said fixed contact memberupon movement of said carriage into said end position, means operable to terminate operation of said carriage shifting mechanism including spring powered initiating means operable upon displacement of said element and an operating member for moving said shift control member to shift initiating position; with a normally ineffectively positioned latch. adjustable upon movements of said operating member to hold the operation of said spring powered means in abeyance upon displacement of said element by the contact member of depressed key and means operable to adjust said latch to ineffective position upon movement of said carriage into said end position.

5. In a motor driven calculating machine having a fixed frame, a carriage transversely shiftable on said frame to' a plurality of denominational intermediate positions and to an end position, mechanism for shifting said carriage to any of said positions, a spring retracted member mounted on said frame and movable to position effective to-initiate and tomaintain operation of said shifting mechanism, a shift control train operable to move and to hold said member in effective position including a coupling displaceable to permit independent retraction of said member by its spring, means responsive to the retraction of said member to terminate operation of said carriage shifting mechanism and a contact member fixed on said carriage for displacing said coupling upon movement of said carriage into said end position; the combination of a plurality of depressible tabular keys mounted on said carriage and each corresponding to a respective one of said intermediate positions, means for maintaining any of said keys in depressed position, a plurality of contact members each related to a respective key and each adjustable upon depression of the related key from ineffective position to a position effective to displace said coupling upon movement of said carriage into the position corresponding to the depressed key and an operating member for moving said shift control train to operate'position, With a normally ineffectively positioned latch adjustable upon movement of said operating member to restrain said spring retractable member in effective position upon displacement of saidcoupling and contact member for adjusting said latch to ineffective position upon movement of'said carriage intosaid end position.

HAROLD W. PINCKNEY.

REFERENCES CITED Q The following references are of record in the file of this patent:

UNITED STATES PATENTS 

